<!DOCTYPE html>
<html>
<head>
<title>后代选择器</title>

<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">

<link rel="stylesheet" href="3.css" type="text/css"></link>

</head>

<body>
	<!-- 后代选择器 -->
	<p>this is my <strong>web<i> hello </i></strong>page</p>
	
</body>
</html>
